2066439 has 4 divisors (see below), whose sum is σ = 2755256. Its totient is φ = 1377624.

The previous prime is 2066437. The next prime is 2066443. The reversal of 2066439 is 9346602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2066439 - 2¹ = 2066437 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344404 + ... + 344409.

It is an arithmetic number, because the mean of its divisors is an integer number (688814).

2^2066439 is an apocalyptic number.

2066439 is a deficient number, since it is larger than the sum of its proper divisors (688817).

2066439 is an equidigital number, since it uses as much as digits as its factorization.

2066439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688816.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 2066439 is about 1437.5113912592. The cubic root of 2066439 is about 127.3720669849.

The spelling of 2066439 in words is "two million, sixty-six thousand, four hundred thirty-nine".